A researcher is interested in whether three different teaching methods are equally effective for students of different reading levels on their reading scores. Students from high, middle, and low reading levels are randomly assigned to one of the three teaching methods. Students' reading scores are recorded below (see the next page). For the data below, use critical value of .05 in the data analyses.

	Teaching method
1	2	3
High reading levels	40	32	30
36	29	35
38	36	33
36	35	38
Medium reading levels	24	20	18
21	29	26
20	25	26
20	30	25
Low reading levels	22	20	18
18	18	14
16	19	19
20	15	19

Multiple Comparisons Dependent Variable: TeachingMethods Tukey HSD Mean 95% Confidence Interval ()) Groups (J) Groups Difference (1-J) Std. Error Sig Lower Bound Upper Bound High Reading Levels Medium Reading Levels 11.167 1.307 <.001 low reading levels medium high the mean difference is significant at level>